公用电网谐波 meaning in English

quality of electric energy supplyharmonics in public supply networkrk

Quality of electric energy supply harmonics in public supply network
电能质量公用电网谐波
In accord with the state standard about harmonic . the harmonic permission value of tangqian line is calculated . some measurement data are shown and analyzed , and some main conclusion is drawed that the 7th harmonic voltages of tangqian line is near to the permission value , total harmonic voltage distortion ratio has oversteped the permission value . the 3th harmonic , the 5th harmonic , the 7th harmonic and the 9th harmonic current from tangqian line all overstep the permission , the largest 5th harmonic current ratio in tangsc reaches 44 % , the 7th harmonic and the 9th harmonic current in tang7c and tangsc is large maybe because the harmonic current is magnified . this paper studies the model of each element in tang yin substation
根据有关公用电网谐波的国家标准，计算出汤牵线注入汤阴变电站的谐波电流允许值，从实测数据可以得出一些重要结论：汤牵线7次谐波电压含有率的最大值接近国标中的限值，汤牵线的谐波电压总畸变率的最大值已超标；汤牵线注入电网的3 、 5 、 7 、 9次谐波电流都超标；汤6c电容器的5次谐波电流含有率较高，最高达到44 ；汤7c和汤8c电容摘要器的7次和9次谐波电流含有率偏高，原因可能是发生了谐波电流放大现象。